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DIN 40NiCrMo2-2 Alloy Steel Bar 40NiCrMo2-2 Round Bars & Rod
125.0 INR/Kilograms
Product Details:
- Grade 40NiCrMo2-2
- Tolerance H9, H11, or as per customer requirement
- Length Custom or standard lengths available, typically 3-6 meters
- Standard DIN 40NiCrMo2-2
- Technique Hot Rolled, Forged
- Diameter 12 mm to 500 mm
- Application Engineering, Automotive, Machinery, Tool Making
- Click to view more
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DIN 40NiCrMo2-2 Alloy Steel Bar 40NiCrMo2-2 Round Bars & Rod Price And Quantity
- 125.0 INR/Kilograms
- 1 Kilograms
DIN 40NiCrMo2-2 Alloy Steel Bar 40NiCrMo2-2 Round Bars & Rod Product Specifications
- H9, H11, or as per customer requirement
- Custom or standard lengths available, typically 3-6 meters
- 40NiCrMo2-2
- Hot Rolled, Forged
- 12 mm to 500 mm
- DIN 40NiCrMo2-2
- Manufacture of heavy-duty parts, shafts, gears, axles
- Round Bar, Rod
- Engineering, Automotive, Machinery, Tool Making
- Heat Treatment, Annealed, Quenched and Tempered
- DIN 40NiCrMo2-2 Alloy Steel
- Black, Bright, Peeled, Turned or Ground
- Green and White (for easy identification)
- 920-1100 MPa (after heat treatment)
- Min 35 J (at -20C, longitudinal)
- As per requirement
- Min 785 MPa (after heat treatment)
- Good (with proper finishing and coating)
- Round
- 28-32 HRC (after suitable heat treatment)
- Excellent after annealing
- 12% (after heat treatment)
- Annealed, Quenched and Tempered, As Rolled
- Surface treated, rust protected
- Good with appropriate process
- 40NiCrMo22, 1.6523, SNCM220
Product Description
DIN 40NiCrMo2-2 (Material Number 1.6546) is a medium-carbon, nickel-chromium-molybdenum "triple-alloy" through-hardening (quench and temper) structural steel.
Unlike low-carbon case-hardening grades (like 20NiCrMo2-2 / AISI 8620), 40NiCrMo2-2 contains higher carbon (~0.40%), allowing it to achieve exceptionally uniform high strength, wear resistance, and deep hardenability throughout its entire cross-section. It is highly valued as a cold-heading or hot-rolled grade for high-fatigue fasteners and heavily loaded machinery parts.
Technical Specifications & Global Equivalents
40NiCrMo2-2 aligns directly with the widely utilized American AISI 8740 chemistry. When cross-referencing materials globally, the equivalents include:
| Standard | Designation / Grade |
| German / European (DIN / EN) | 40NiCrMo2-2 / WNr. 1.6546 |
| AISI / SAE (USA) | 8740 / UNS G87400 |
| British Standard (BS 970) | Type 7 / 816M40 |
| UNI (Italy) | 40 NiCrMo 2 KB |
| GOST (Russia) | 38ChGNM (38) / 40KhN2MA |
Chemical Composition (DIN 1.6546 / EN 10263-3)
The balancing of nickel, chromium, and molybdenum prevents grain coarsening during high-temperature treatments and ensures minimal distortion when oil quenched.
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Carbon (C): 0.37% 0.44% (allows high base hardness without case-carburizing)
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Nickel (Ni): 0.40% 0.70% (imparts structural core toughness and impact strength)
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Chromium (Cr): 0.40% 0.60% (increases wear resistance and depth of hardenable zone)
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Molybdenum (Mo): 0.15% 0.30% (prevents temper brittleness)
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Manganese (Mn): 0.70% 1.00%
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Silicon (Si): 0.15% 0.40%
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Phosphorus (P): max. 0.035%
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Sulfur (S): max. 0.035%
Key Mechanical Properties & Processing
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Supply Condition: Typically supplied as hot-rolled or cold-drawn round bars in the Spheroidize Annealed (+AC) or Treated for Cold Shearability (+S) state to accommodate cold-upsetting or heavy machining before final hardening.
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Quenched & Tempered (Q+T) Strength: Typically targeted for a final tensile strength of 9001200 MPa, depending on the tempering temperature.
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Cold-Forming Response: As a specification under cold-heading standards, it exhibits excellent cold workability with relatively low-to-medium work-hardening rates.
Core Engineering Applications
Because 40NiCrMo2-2 round bars offer excellent torque resistance and high fatigue strength under cyclic loads, they are extensively chosen for:
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High-Strength Fasteners: Heavy-duty engine bolts, aircraft-grade fasteners, socket head caps, and connecting rod bolts.
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Drivetrain Components: High-fatigue axles, power-transmission shafts, crankshafts, and torsion bars.
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Industrial Hardware: High-tensile clamping components, steering linkages, and critical wear rods in mechanical presses.
Superior Mechanical Properties
The 40NiCrMo2-2 alloy steel bars provide a minimum yield strength of 785 MPa and a tensile strength of 920-1100 MPa after proper heat treatment. With an elongation of 12% and an impact value of at least 35 J at -20C, these bars are ideal for components subjected to high stress and low temperatures, ensuring durability and performance in critical applications.
Versatile Applications
Engineered for use in sectors such as automotive, machinery, tool making, and general engineering, the DIN 40NiCrMo2-2 round bars and rods are preferred for manufacturing shafts, gears, axles, and other heavy-duty parts. Their balance of hardness, toughness, and workability supports a wide range of precision engineering tasks.
Flexible and Customizable Solutions
Our alloy steel bars are available in standard or custom lengths and can be supplied in hot rolled, forged, black, bright, peeled, or ground finishes. Tolerances such as H9 and H11 can be tailored to specific project requirements, while a variety of delivery and surface conditions support diverse use cases and environments.
FAQ's of DIN 40NiCrMo2-2 Alloy Steel Bar 40NiCrMo2-2 Round Bars & Rod:
Q: How can the DIN 40NiCrMo2-2 alloy steel bars be supplied?
A: DIN 40NiCrMo2-2 alloy steel bars can be supplied in various conditions including annealed, quenched and tempered, or as-rolled, with surface finishes such as black, bright, peeled, or ground. Sizes range from 12 mm to 500 mm in diameter, and lengths can be customized or delivered in standard 3-6 meter bars.Q: What are the common uses for 40NiCrMo2-2 round bars and rods?
A: These bars and rods are commonly used in engineering, automotive, machinery, and tool making sectors, particularly for manufacturing heavy-duty parts such as gears, shafts, axles, and other components requiring high strength and toughness.Q: When is it recommended to use this steel for fabrication?
A: It is advisable to use DIN 40NiCrMo2-2 bars when superior mechanical properties, such as high yield and tensile strength, good impact resistance at low temperatures, and excellent machinability after annealing, are required in the finished component.Q: Where are the DIN 40NiCrMo2-2 alloy steel bars typically sourced from?
A: These bars are widely available through dealers, exporters, fabricators, manufacturers, producers, retailers, suppliers, and traders in India and are delivered according to customer specifications and minimum order requirements.Q: What is the process for achieving desired mechanical properties in these bars?
A: To achieve specified hardness, yield, and tensile strengths, the bars undergo appropriate heat treatment processes such as annealing, quenching, and tempering, followed by surface treatments for rust protection and color coding for easy identification.Q: How does the rust protection and surface treatment benefit users?
A: Surface treatments and rust protection enhance the durability and longevity of the steel bars, ensuring reliable performance in demanding environments and reducing maintenance needs.Q: What are the benefits of using DIN 40NiCrMo2-2 alloy steel round bars in manufacturing?
A: The primary benefits include consistent mechanical properties, good corrosion resistance with suitable finishes, high machinability after annealing, reliable weldability, and flexibility in size, length, and tolerance, making them versatile for a range of heavy-duty applications.Tell us about your requirement
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